Signal transmitter



FIG. 1 is a perspective view of a signal transmitter showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a front elevational view thereof, showing the cover of the signal transmitter in an open position;

FIG. 9 is a bottom plan view thereof;

FIG. 10 is a right side elevational view thereof; and,

FIG. 11 is a perspective view thereof. 

The ornamental design for a signal transmitter, as shown and described. 